Electric-arc lamp



(No Model.)

1). A. SHESLER. ELECTRIC ARC LAMP.

No. 576,475. Patented Pb. 2 1 97.

DANIEL A. SHESLER, OF TOLEDO, OHIO.

ELECTRIC-ARC LAM P.

SPECIFICATION forming part of Letters Patent No. 576,47 5, datedFebruary 2, 1897.

Application filed February 13, 1896. Serial No. 579,170. (No model.)

To all whom it may concern.-

Be it known that I, DANIEL A. SHESLER, a citizen of the UnitedStates,residing at Toledo, in the county of Lucas and State of Ohio,have invented certain new and useful Improvements in Arc-Lamps and I dodeclare the following to be a full, clear, and exact description of theinvention, such as will enable others skilled in the art to which itappertains to make and use the same.

My invention has relation to improvements in electric-arc lights; andthe objects are to provide an electric-arc-light mechanism effecting anextension of the are between the carbon tips, to create a magnetic fieldin the light by the interposition of electromagnets in the circuitadjacent to the clamps and between the leading wire and the carbons, andalso to provide an arc-light with carbons composed of a particularsubstance readily energized and deenergized or magnetized anddemagnetized and having the desirable characteristics and qualities ofdurability and intensity.

I accomplish the objects of my invention by the means illustrated in theaccompanying drawings, forming a part of this specification, andwherein-- Figure 1 shows the application of my invention to an arc-lightarranged in a frame or holder of common construction. Fig. 2 is a planedge view of one of the clamps. Fig. 3 is a plan view of one of thesolenoids, the clamp, and cross-section of the carbon.

A designates the suspension-frame, which maybe of any of the well-knownand approved makes or construction and adapted to hold and retain thelower carbon on its bottom cross-bar, substantially as shown.

B designates a clamp secured to the lower end of the upper leader or rod3 by any suitable means.

I have shown the construction of the several clamps employed, in Fig. 2of the drawings, as consisting of two semicircular limbs hinged togetherand formed with parallel ears, through which a clamping-screw isprojected. Below the clamp B is secured an insulating-disk 1, consistingof any material suited to completely interrupt the progress of thecurrent.

0 designates the upper carbon, carried and held by a clamp 2 at itsupper end, the upper face of the clamp being contiguous to the underface of the disk 1.

D designates a solenoid suitably mounted and secured by any propermeans. I have shown the solenoids as being sustained in position by thecircuit-wires, which are of such size as to perform this service. Thissolenoid is of enlarged diameter and of diminished length, the objectbeing to utilize an enlarged magnetic influence Without multiplicationof the coils in the length of the spool. To the leader 3 is connectedone of the wires, as 4, of the solenoid D, and the other end of the coilis connected to the carbon-clamp 2, substantially as shown, so that thecurrent reaches the upper carbon through the leader 3, the wire ehthencethrough the solenoid, and thence by wire 5 through the clamp to thecarbon.

C designates the lower carbon, held in a suitably-supported clamp 6,resting on an insulating-disk '7, supported by a clamp 8, mounted on thebottom bar of the frame. Adjacent to the foot of the lower carbon ismounted and secured a solenoid D, similar in dimensions and constructionto the upper solenoid D, the circuit being completed through the carbonby wire 9, leading from the clamp 6 to solenoid D, thence by wire 10 toclamp 8, and through the bar of the frame.

I have not shown mechanism for feeding the carbons, because any of theWell-known mechanisms now employed to feed and regulate the relation ofthe carbon tips may be used in connection with my invention.

The carbons O C are of particular material, being composed of graphitoidsilicon, asbestos, and carbon. The asbestos, I have found by experiment,gives great durability to the carbon pencils, and, while a poorconductor in itself, it alfords an excellent substance for the purposes,because it increases the area of the are field and the intensity andbrilliancy of the light. By the interposition of the solenoids in thecircuits the luminous arc is made to revolve rapidly around the carbons,causin g the carbons to be consumed regularly and dillerent l'orms olelectric-light mechanism without departing from the spirit of the invention and without materially varying the described mode of operation.5 Having thus described my invention, what l claim, and desire to secureby Letters Patout, is

1. In an. electric-arc light, the combination with the upper carbon, ofa lower carbon, an insulated support therefor, a conductor adjacent tothe insulator, and a solenoid interposed in the circuit adjacent to thecarbon and having connections to the carbon and to the conductoradjacent to the insulated sup- 15 port therefor.

2. In an electric-are light, the combination

